AST RESEARCH TECHNICAL BULLETIN TB-0150 2-19-86 ERROR IN AST-5250/DISPLAY USER'S MANUAL In the AST-5250/DISPLAY User's Manual, part number 000297-001A dated September 1985, on page 2-7 in the Configuration and Installation Section, the instructions state that in an IBM PC-AT you must set the slide switch SW1 to the OFF position (toward the front of the system unit). The instruction should be to set the switch toward the back of the system unit.